name: Enforce milestone on close

on:
  issues:
    types:
      - closed

permissions:
  issues: write

jobs:
  check-milestone:
    name: Check Milestone
    if: github.repository == 'netbox-community/netbox' && github.event.issue.state_reason == 'completed'
    runs-on: ubuntu-slim

    steps:
      - name: Reopen issues completed without a milestone
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          GH_REPO: ${{ github.repository }}
          ISSUE: ${{ github.event.issue.number }}
        run: |
          # Grace period, in case the milestone is assigned immediately after closure
          sleep 90

          # Re-check the issue: bail out if it has been reopened or a milestone has since been set
          DATA=$(gh issue view "$ISSUE" --json state,milestone)
          STATE=$(jq -r '.state' <<< "$DATA")
          MILESTONE=$(jq -r '.milestone.title // ""' <<< "$DATA")
          if [ "$STATE" != "CLOSED" ] || [ -n "$MILESTONE" ]; then
            echo "Nothing to do (state=$STATE, milestone=${MILESTONE:-none})"
            exit 0
          fi

          gh issue reopen "$ISSUE" --comment \
            "This issue was closed as completed without a milestone assigned, and has been reopened automatically. Please assign the milestone for the upcoming release, then close the issue again."